What is the primary purpose of a gas furnace?

The primary purpose of a gas furnace is to provide heating through the combustion of natural gas or propane. Gas furnaces operate by burning these fuels to generate heat, which is then distributed throughout a living space via air ducts or radiators. This heating process is essential in maintaining comfortable indoor temperatures during colder months, especially in climates where winter temperatures can drop significantly.

The combustion of gas in the furnace creates hot air or hot water, depending on the type of furnace system, which is an efficient and effective way to heat homes and buildings. Understanding this function is crucial for HVAC technicians, as it enables them to diagnose issues, perform maintenance, and ensure efficient operation of the heating system. Heating is a fundamental requirement in residential settings, making this purpose of the gas furnace integral to home comfort.